Wall hook



FIG. 1 is a front perspective view of a wall hook showing our new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken line representing the rear surface of the wall hook represent disclaimed subject matter and forms no part of the claimed design. 

CLAIM The ornamental design for a wall hook, as shown and described. 